the heart is just a pulsing muscle, it doesn't deserve credit for how we feel. the existence of a soul has never been proven so I choose to look at love from a scientific perspective.
when I tell you, "I love you", it's just a complex mix of neurons firing signals around my body, convincing you of these feeling that are just made of chemicals.
"my heart beats for you" no it doesn't. it beats to spread blood so we can live.
when I tell you, "we have a connection", it's really just my brain wanting some stimulation.